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Hydraulic Pressure Unit Inspection

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
STEP INSPECTION ACTION
1 PURPOSE: INSPECT CONDITION OF RUBBER PART OF DRIVE BELT AUTO TENSIONER
  • Is oil seeping out from the upper or lower sideof the rubber part?
G11275713Courtesy of MAZDA MOTORS CORP.
 Yes Go to the next step.
No The hydraulic pressure unit is normal therefore the inspection is completed.
2 PURPOSE: INSPECT CONDITION OF RUBBER PART OF DRIVE BELT AUTO TENSIONER
  • Wipe off any dust or oil on the surface of the rubber part.
  • Visually inspect the rubber part for damage or separation.
  • Is the rubber part damaged?
 Yes Replace the drive belt auto tensioner because the rubber part is damaged and there is oil leakage.
(See DRIVE BELT AUTO TENSIONER REMOVAL/INSTALLATION .)
No Go to the next step.
3 PURPOSE: INSPECT CONDITION OF HYDRAULIC PRESSURE UNIT OF DRIVE BELT AUTO TENSIONER
  • Insert a wrench into the hexagonal area of the drive belt auto tensioner.
  • Apply force to the wrench and force the drive belt auto tensioner to stroke.
  • Does the resistance increase when the drive belt auto tensioner compresses, and decrease when it expands?
 Yes Verify that the drive belt assembly condition is normal, then go to the next step.
No Resistance is high in up and down directions:
4 PURPOSE: INSPECT CONDITION OF RUBBER PART OF DRIVE BELT AUTO TENSIONER
  • Is oil seeping out from the upper or lower side of the rubber part?
G11275713Courtesy of MAZDA MOTORS CORP.
 Yes Oil is leaking from upper area of rubber part:
  • The hydraulic pressure unit is normal therefore the inspection is completed.

    Oil is leaking from lower area of rubber part:

  • Replace the drive belt auto tensioner due to a poor seal on the rubber part.
  • (See DRIVE BELT AUTO TENSIONER REMOVAL/INSTALLATION .)
No The hydraulic pressure unit is normal therefore the inspection is completed.
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